The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.

Background:

Asavyo is the SW-most of three large silicic stratovolcanoes constructed along a NE-SW-trending line in the Danakil horst. A large 12-km-wide caldera truncates the summit of the volcano. Basaltic lava flows blanket the flanks of Asavyo, which merge into the Mogorros plains to the south. Although the age of the volcano is not known precisely, Asavyo was considered to have erupted during last 2000 years (International Association of Volcanology and Chemistry of the Earth's Interior 1973). A large post-caldera cone was constructed near the center of the caldera, and smaller pyroclastic cones occur within the caldera and on its flanks.---Smithsonian / GVP volcano information

Ijen volcano photos: Ijen volcano in East Java is famous for its turquoise acid crater lake and the large sulfur deposits that are being mined by local workers. At night, the scene is illuminated by ghostly blue flames, as sulfur ignites.

Photos from Germany: Germany has a large number of volcanoes - most of them extinct, but the Eifel volcanic field is still potentially active.

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